Journal article
Enhanced sintering and conductivity study of cobalt or nickel doped solid solution of barium cerate and zirconate
Electroceramics, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
BaZr(0.9 − x)CexY(0.1 − y)CoyO(3 − δ) (with x = 0 and 0.2; y = 0.01; 0.02; 0.05) and BaZr(0.9 − x)CexY(0.1 − y)NiyO(3 − δ) (with x = 0 and 0.2; y = 0.01; 0.02) compounds have been synthesized by solid state reaction at 1400 °C and obtained as dense pellets after sintering at 1450 °C. Cobalt or nickel doping reduces the sintering temperature by about 250 °C.
The samples are stable in a CO2 rich atmosphere at 600 °C but the 5% B site Co doped samples are aging in wet atmosphere. The conductivity has been measured for the 1 and 2% doped samples (both cobalt and nickel), in different wet atmospheres and compared to the undoped compounds. The ionic and p-type conductivities have been determined, as well as the activation energy in wet reducing atmospheres, in which protonic conduction is dominant.
A decrease of the ionic conductivity is noticeable for the cobalt or nickel doped barium zirconate (x = 0), while not for cobalt or nickel solid solution of barium cerate and zirconate (x = 0.2).
Language: | English |
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Year: | 2010 |
Pages: | 694-700 |
ISSN: | 18727689 and 01672738 |
Types: | Journal article |
DOI: | 10.1016/j.ssi.2010.04.007 |
ORCIDs: | Bonanos, Nikolaos |